One continues to think, often, of September 11th.
One of the (many) ways to remember the catastrophe--to focus upon, reflect upon, the magnitude of the terror, the loss, and the heroism--is to read.
As such, a few days ago, I began reading the 2019 oral history of September 11th, and its aftermath, The Only Plane in the Sky, by Garrett M. Graff (Avid Reader Press/Simon & Schuster).
Historian Jon Meacham said, of the book, in 2019: "This is history at its most immediate and moving. In The Only Plane in the Sky, Garrett Graff has crafted an enduring portrait of a deadly and consequential day, a day that has shaped all other subsequent days in America..."
https://www.amazon.com/Only-Plane-Sky-Oral-History/dp/1501182218/ref